getting an ID card reader

Electronic Identity – How It Works in Estonia (Video)
How is an ID card used
Downloading ID card software

An Estonian ID Card reader otherwise known as a Smart Card Reader can be purchased in Australia through the following channels:

Search on eBay for "Smart Card Reader"
Dick Smith Stores
Battery Expert
Kogan

They usually range from $15-20.
It appears that Officeworks do not carry them.

I live in Australia and don't permanently reside in Estonia, why should I use an ID card?

Vote in Estonian elections (I-voting)
Manage/Withdraw/Transfer funds from Estonian bank account in Euros
Fully renew your passport and/or ID card electronically
Send and receive documents securely (digital signatures)

While visiting Estonia, say as a tourist, you may use it...

As a legal travel ID for travelling within the EU
As identification on Estonian public transport
As a driver's licence identification / renting a car
Taking out an Estonian SIM card
As a national health insurance card
Visiting local doctors/hospitals and using e-prescription services

using an ID card